7.6.12. Discovery
Discovery protocols can be used to discover and to get discovered by other hosts.
Administrative status:
Enable or disable the Discovery
The following protocols are supported:
Link Layer Discovery Protocol
LLDP
Cisco Discovery Protocol
CDP
Foundry Discovery Protocol
FDP
Nortel Discovery Protocol
SONMP
Extreme Discovery Protocol
EDP
ICMP Router Discovery Protocol
IRDP
IRDP implements RFC1256 and can also inform locally connected hosts about the nexthop gateway.
Any discovered hosts will be exposed to the LLDP-MIB and can be queried over SNMP or CLI/GUI.
7.6.13. Redundancy
This section can be used to set up a redundant pair of M!DGE (or other systems) by running the Virtual
Router Redundancy Protocol (VRRP) among them. A typical VRRP scenario defines the first host
playing the master and another the backup device, they both define a virtual gateway IP address which
will be distributed by gratuitous ARP messages for updating the ARP cache of all LAN hosts and thus
redirecting the packets accordingly.
A takeover will happen within approximately 3 seconds as soon as the partner is no longer reachable
(checked via multicast packets). This may happen when one device is rebooting or the Ethernet link
went down. Same applies when the WAN link goes down.
In case DHCP has been activated, please keep in mind that you will need to reconfigure the DHCP
gateway address offered by the server and let them point to the virtual gateway address. In order to
M!DGE2 GPRS/UMTS/HSPA+/LTE router – © RACOM s.r.o.
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